Photoshop CS3 for Screen Printers- P12

Photoshop CS3 for Screen Printers- P12: The toolbox is the heart of Photoshop CS3, and where you’ll find thetools you need to create your artwork and perform editing tasks. Fromthe toolbox you can access the selection tools, shape tools, type tools,Crop tool, and eraser tools. These are basic tools that any screen printeror graphic artist needs.
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Photoshop CS3 for Screen Printers- P12306 Part III / Working with Client Files6 Caution! Images that are screen printed get darker and softer during the print pro- cess. At each step, sharpness is lost. Therefore, be generous and aggressive when sharpening an image or increasing saturation. To use Unsharp Mask: 1. Open the file Fish Final copy.jpg from the Chapter 16 folder on the companion CD-ROM. This file is indicative of what a client might give you for a sign, shirt, or other substrate, in that first it’s a JPEG and second it needs to be sharpened. 2. Choose Filter>Sharpen>Unsharp Mask. 3. In the Unsharp Mask dialog box, make sure the Preview box is checked. Then move the sliders as follows: n Change Amount to 150 percent n Change Radius to 1 n Change Threshold to 5 See Figure 16-6. Figure 16-6: Using Unsharp MaskChapter 16 / Working with Photos and Making Selections 307 4. Look at the picture while unchecking and rechecking the Preview box to see the difference. The additional sharpness enhances the pic- ture. Click OK when done. When you get to the point in sharpening when the image looks grainy or too sharp, step back a level or two. Try not to get a halo effect on the image; if you do, reduce the levels a little. You’ll use this command on almost all images for screen printing. The Curves Tool Revisited As I mentioned earlier, the Curves tool is my favorite and is great for working with photos. Curves can be used to perform all of the adjust- ments mentioned earlier, including adjusting highlights, midtones, and shadows, increasing brightness and contrast, and correcting color. By combining this tool and the options from the Image>Adjustments menu, with practice you can correct almost any photograph. Project 16-3: The Basics—Readying an Image for Color Separation and Screening In order to get a photograph ready for screening, you need to prepare it by using and applying Unsharp Mask, adjusting tone curves, and adjust- ing the brightness, contrast, hue, and saturation. Although each photo or image is different, here are some basic steps to follow to get you into the habit of using and applying the available correction tools: 1. Open the file CosmosPeppers.psd from the Chapter 16 folder on the companion CD-ROM. This is a photograph of artwork created by our artist here at North Texas Graphics. She would like this artwork colorized and placed on a tote bag to promote her proposed art gallery.. Note: The quality here is indicative of the quality you might get as a screen printer. The image is flat, doesn’t have enough contrast, and has other issues that will make screening the image complicated. 2. Notice that there is a fine rectangular line around the image, and it shows in the image. Use the Eyedropper tool to sample the color of308 Part III / Working with Client Files the background. Use either the Paint Bucket tool or the Brush tool to clean up the background. 3. Apply unsharp masking to the image using Filter>Sharpen> Unsharp Mask. This image needs a lot of sharpening. Change Amount to 290 percent and Threshold to 8. Leave Radius at 1. To see the before and after, check and uncheck the Preview box. See Figure 16-7. Click OK. Figure 16-7: Readying an image for screening 4. Select Image>Adjustments>Hue/Saturation. Move the Satura- tion slider to +35. Click OK. (Remember, you’ll lose saturation when scanning and printing, and when the ink hits the fabric.) 5. Use Image>Adjustments>Curves to open the Curves dialog box. This particular artwork is flat, so position the curve so that it looks like the one shown in Figure 16-8. This is an “S” curve and enhances this image (as it does with similar flat images).Chapter 16 / Working with Photos and Making Selections 309 Figure 16-8: Applying an “S” curve 6. From the Channel drop-down, click on the Red, Green, and Blue channels and position the curve accordingly. Changing the red chan- nel will only affect the red in the image, green affects only green, and blue affects only blue. Configure the curves to suit your artistic tastes. Click OK.] Tip: As you get more comfortable here, combine this step with the Info palette and Eyedropper to see if the colors that you are using are in the CMYK gamut. Although Photoshop automatically brings all colors into the color gamut when converting from RGB to CMYK, it’s best to try to bring all col- ors into the gamut before converting. There is more on this in Chapter 23. Out-of-gamut colors are represented by an exclamation point in the Info palette (see Chapter 11). 7. You can continue to tweak the image indefinitely; however, one must decide when enough is enough! Save your new file as CosmosPeppersII.psd.310 Part III / Working with Client Files Figure 16-9: Before and after Of course, your client will probably want text or an edge effect to go along with their design, so you’ll have to continue on from here. These topics have been discussed in earlier chapters.. Note: Image>Adjustments>Selective Color is also an important tool, but it is very complex. You’ll learn about this tool in Chapter 26.Selections with the Magic Wand Tool Let’s move on to selections. Having the ability to select an area or an object in Photoshop is quite p ...